Use the below information to answer the remaining questions.

Due to government funding cuts, you have recently been appointedas head physiologist for the Centre for Disease Control, due toyour unparalleled physiology knowledge and willingness to work forminimum wage.

Billions of people served worldwide by the popular fast foodchain McDowell’s have all fallen ill due to a mysterious chemicalbeing used in the beef. You are tasked with gathering as muchinformation as possible about this chemical with a view to treatingthose affected.

Note: When people stop eating at McDowell’s, they are no longeraffected, but apparently that isn’t an option, especially at1:00am, nor is it an option to change the beef.

The chemical leads to a dramatically increased heart rate.

Through animal testing, you determine that the chemicalincreases heart rate by acting directly on the heart itself andaffects autonomic nervous system signaling. It appears to have nodirect effect on blood vessels. You have not determined if it isaffecting other organ systems.

Assuming the drug only acts on one type of receptor, which ofthe following receptors could it potentially be acting on, giventhe above information? (select all that apply):

Group of answer choices

Acting on nicotinic receptors of both sympathetic andparasympathetic postganglionic neurons.

Acting on muscarinic receptors.

Acting on beta-1 adrenergic receptors.

Acting on beta-2 adrenergic receptors.

Acting on alpha-1 adrenergic receptors.

Acting on alpha-2 adrenergic receptors.

You are given the opportunity to interview the sufferers of thedelicious beef scandal. Considering the receptors you have narrowedyour search down to in question 10, which of the followingquestions could help you determine which receptors specifically arebeing affected by the chemical (select all that apply)?

Group of answer choices

Have you experienced any muscle weakness?

Have you had difficulty breathing?

Have your fingertips turned white (Generalisedvasoconstriction)?

Have you experienced any erectile dysfunction?

Have you experienced an increased sensitivity to light(inability to constrict pupils)?

You ask the patients all of the above questions (even thoughsome may have been irrelevant), and they answer “no” to all ofthem. Judging by this, the chemical must be: (select one)

Group of answer choices

activating nicotinic receptors.

blocking nicotinic receptors.

activating muscarinic receptors.

blocking muscarinic receptors.

activating beta-1 receptors.

blocking beta-1 receptors.

activating beta-2 receptors.

blocking beta-2 receptors.

activating alpha-1 receptors.

blocking alpha-1 receptors.

activating alpha-2 receptors.

blocking alpha-2 receptors.

I have answers for the first two but need the third. If youcould still answer the first two to see If I was correct ?